High-Precision Relay Iron Cores for Stable Electromagnetic Performance

1. Material: Made of low-carbon steel or high-permeability soft magnetic steel (such as pure iron, DT4, 1010/1020 steel), possessing good magnetic permeability and low coercivity.

2. Shape and Structure: The overall structure is cylindrical with a flat cut edge on the outer side (anti-rotation design), and a stepped concave structure at the top.

3. Size Range: Outer diameter is typically within the range of Φ10–Φ50 mm, and height 10–40 mm can be customized; internal hole diameter and step dimensions are precisely matched according to relay specifications, and OEM customization is supported.

4. Internal Design: The inner hole adopts a multi-stage stepped design + center thread/locating hole design to effectively control the air gap and improve magnetic flux density.

5. Surface Treatment: The outer surface is precision machined with a delicate brushed metal texture; zinc plating, nickel plating, or blackening treatments are available to improve corrosion resistance and environmental adaptability.

6. Manufacturing process: CNC precision turning is adopted, and the tolerance of key dimensions can be controlled within ±0.001mm; key contact surfaces are precision machined or ground to ensure coaxiality and magnetic performance consistency.

Precision Relay Iron Cores for Superior Electromagnetic Performance

Reliable relay performance begins with a high-quality iron core. At CAIYI Precision, we manufacture high-precision relay iron cores designed to deliver stable electromagnetic performance, fast response times, and long-term reliability. Through advanced CNC machining and strict quality control, our iron cores feature excellent dimensional accuracy, optimized magnetic efficiency, and minimal energy loss, making them ideal for automotive, industrial, and electronic relay applications.

Key Technical Advantages

Enhanced Thermal Stability & Lower Energy Consumption

We utilize premium soft magnetic materials with excellent magnetic permeability and low core loss. This effectively minimizes heat generation during operation, improves energy efficiency, and ensures stable performance under continuous working conditions.

Fast Response & High Magnetic Efficiency

Precision CNC machining guarantees superior concentricity and accurate air-gap control. The optimized structure enhances magnetic force, enabling faster switching speeds, improved contact stability, and higher operational efficiency.

Exceptional Dimensional Accuracy & Durability

Strict tolerance control and advanced manufacturing processes ensure consistent dimensions and reliable assembly. Reduced mechanical wear helps extend relay service life while maintaining long-term performance stability.

Reliable Surface Protection

To meet the requirements of demanding environments, we provide multiple surface treatment options, including zinc plating, nickel plating, and black oxide finishing. These treatments enhance corrosion resistance, oxidation resistance, and overall product durability.

Applications

Widely used in automotive relays, power relays, industrial control systems, new energy equipment, communication devices, and various electromagnetic switching applications.